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refamat Posts: 2
8/16/2018
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Anyone know what the pinkish mark at the top of the page means or why it was done?
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Ronbatman Administrator Posts: 2530
8/16/2018
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I know that it was part of the coloring process. Printing companies would use cyan, magenta, and yellow and mix them for all the colors. That is a strip of Magenta on the top of that book. I'm not sure why it was done though.
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solarno Posts: 166
8/16/2018
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I'm totally going out on a limb here, but I think these were color quality test marks to make sure a particular process color (the ones Ron mentioned plus black) is correct. You also see this type of thing on a lot of consumer packaging where there will be a series of small boxes or circles somewhere on the packaging that represent all of the individual colors used for that packaging. This way during a quality check you can see which color might be causing a problem.
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Biddle7819 Posts: 174
8/17/2018
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Do these in any way affect values?
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solarno Posts: 166
8/17/2018
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Biddle7819 wrote:
Do these in any way affect values?
Since these were a common part of the 4-color printing process they should not affect value in any way.
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Ronbatman Administrator Posts: 2530
8/19/2018
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I agree with Solarno, they do not affect value. It was part of the process to create books.
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expander Posts: 241
8/21/2018
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Since the colors are printed in layers these can also be used as alignment marks to make sure the next color to be pressed would not stray. Normally these are higher up on the paper before the book gets its final trim and these are usually cut off with said trimming sometimes the marks are taller and whats left is what you see in your photo. I've seen them in many variations of size,color and, proximity to the story panels and I would not go so far as to call it a defect just an artifactual part of the manufacturing process.
edited by expander on 8/21/2018
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